At the moment, time of day is the only apparent determining factor for solar panel charge. I should be rewarded for considering incident angle on the panels when I am charging or roving, to pick better strategies for energy management.

When roving into a crater with the sun behind the rover:

• Base charge is e.g. 6W
• On entering the crater, rover nose dips down, and sunlight is more oblique, so charge should decrease, e.g. 4W
• Driving up the far side of the crater the sun approaches the panel's normal, so charge should increase e.g. 10W